Effectiveness of Lumbosacral Orthoses for Nonspecific Low Back Pain
Salem W. Musleh, MSPO
Prosthetic and Orthotic Resident
King Faisal Specialist Hospital & Research Centre
Clinical Question
In adults with subacute or chronic nonspecific low back pain, does wearing a lumbosacral orthosis, compared with usual care, reduce pain and disability and improve physical function or trunk-muscle performance?
Background
With a lifetime prevalence near 40%, low back pain is the leading global contributor to years lived with disability.1,2 Contemporary guidelines emphasize education, exercise, and self-management.3 While lumbosacral orthoses (LSOs) are theorized to limit painful motion and unload the spine, early systematic reviews found brace trials to be small and methodologically weak.4,5 Modern randomized controlled trials (RCTs) evaluating specific wear schedules now permit a more focused critical appraisal.6-10
Search Strategy
Synthesis of Results
Five recent RCTs evaluated bracing for subacute or chronic low back pain, but the magnitude and direction of effect varied according to brace design, wear schedule, and compression level.6-10 A soft, high-tension LSO worn four hours per day reduced pain by about 1 cm on a 10-cm Visual Analogue Scale (VAS) and improved disability compared with medication, without compromising trunk-muscle strength or endurance.6 When a full-time non-extensible LSO was added to physiotherapy, it produced a clinically important 10-point gain on the Oswestry Disability Index, although pain relief was modest.9 A sacroiliac belt delivered pain and disability outcomes equivalent to a standard lumbar brace while subjects rated it as more comfortable,7 whereas an intermittent semi-rigid corset actually worsened functional scores in one high-quality trial.10 Across all studies, ultrasound and electromyography revealed no trunk-muscle atrophy or strength loss, postural stability remained unchanged, and no serious adverse events were reported.6,8-10 Benefits generally emerged within the first 4–12 weeks and stabilized thereafter,6,9 suggesting that bracing is best used as a short-term adjunct to active rehabilitation. Nevertheless, the trials were small and their brace protocols heterogeneous, so the overall certainty of evidence remains moderate.
Clinical Message
For patients whose subacute or chronic nonspecific low back pain persists despite guideline-based education and exercise, prescribing a well-fitted non-extensible or high-tension soft LSO can provide a small but clinically worthwhile reduction in pain and disability for roughly 4–12 weeks.6,9 Sacroiliac belts offer equivalent symptom relief with higher user satisfaction, suggesting they may be preferable when comfort and adherence are priorities.7 In contrast, semi-rigid braces worn only “as needed” have failed to relieve pain and have actually worsened disability and quality-of-life metrics in at least one high-quality trial, so their routine use should be approached cautiously.10 Importantly, none of the included studies identified muscle atrophy or other serious harms, even with prolonged wear.6,8 Clinicians should position bracing as a complement rather than a substitute for active rehabilitation, set clear goals for tapering wear time as function improves, and tailor brace choice, compression level, and daily schedule to individual patient needs while monitoring disability and quality-of-life outcomes.3 Further long-term investigations are necessary to refine device selection, optimal compression, and patient subgroups most likely to benefit.1,3-5,10